Electrochemical performance of LiFePO4/C synthesized by sol-gel method as cathode for aqueous lithium ion batteries

被引：63

作者：

Zhang, Yingtang ^{[1
]}

Xin, Pengyang ^{[2
]}

Yao, Qiufeng ^{[1
]}

机构：

[1] Henan Inst Technol, Dept Elect Engn, Xinxiang 453003, Peoples R China

[2] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453003, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 741卷

基金：

中国博士后科学基金;

关键词：

Lithium ion batteries; Aqueous electrolyte; LiFePO4; Sol-gel; Carbon coating; CYCLING STABILITY; DOPED LIFEPO4; HIGH-POWER; LIMN2O4; ELECTROLYTES;

D O I：

10.1016/j.jallcom.2018.01.083

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Rechargeable lithium ion batteries with aqueous electrolyte are low-cost, safe, and environmental friendly compared with organic electrolyte. Lithium iron phosphate (LiFePO4) is a potential candidate as the cathode for aqueous rechargeable lithium batteries (ARLBs), due to its excellent electrochemical window, stable structure and high theoretical capacity. However, the poor electronic conductivity and low lithium ion diffusion rate in bulk considerably restrict the electrochemical performance of LiFePO4. Herein, LiFePO4/C composites were successfully prepared by a facile sol-gel approach. Physical and electrochemical properties of the LiFePO4/C composites as cathode material in aqueous electrolyte were investigated. The LiFePO4/C composites exhibit a high reversible capacity of 163.5 mAh g(-1) at 0.1C. Moreover, LiFePO4/C shows excellent rate capability and cycling capability. The improved electrochemical performance could be attributed to the positive effects of homogenous conductive carbon, which ensures the nanoscale Li-ion diffusion path and continuous electrical contact in bulk electrode. (c) 2018 Elsevier B.V. All rights reserved.

引用

页码：404 / 408

页数：5